Table 5.

False positive links, missed birth records and sensitivity of probabilistic record linkage by linkage cut cut-off values; females in the Children of the 1950's study linkage to SMR 2 maternity records.

Linkage cut-off point	Number of false positive linksa	Number of missed birth recordsa	Sensitivitya
22	134	454	92%
23	91	617	89%
24	68	775	86%
25	61	926	83%
27	37	1169	84%
29	32	1422	74%
31	28	1777	68%
35	10	2940	53%
40	3	4383	21%

^a Calculated only for those 2604 women where information from both sources is available and who gave birth to 5533 children in Scotland.